10/17: Prison escape that defies belief; Humpback whales making sounds without vocal chords
Two prisoners both serving life sentences for murder escaped from a Florida prison within 11 days of each other. Prison officials released them after receiving documents bearing the forged signature of a circuit judge; and marine biologist Nan Hauser has studied humpback whales extensively in the South Pacific. She explains to Scott Pelley for "60 Minutes" why the animals use a complex mix of far-reaching sounds to communicate underwater.